Simple Circle Geo Question (1 Viewer)

[velox]

Two chords AB and CD of a circle intersect at a point E inside the cirlce. Prove that triangles AEC and DEB are equiangular.

 

[withoutaface]

Two chords AB and CD of a circle intersect at a point E inside the cirlce. Prove that triangles AEC and DEB are equiangular.

Equal angles standing on same chords?
Don't have time to do it properly, but try that and/or cyclic quads.

 

[velox]

crap, it is equal angles standing on same chords. Thanks.

 

[Xayma]

That or ∠ AEC=∠ EBD (vert opp ∠'s)

∠ ACE=∠ EBD (∠'s in alt segment are =) [not to sure if that is the exact wording oh well]

 

[mojako]

That or ∠ AEC=∠ EBD (vert opp ∠'s)

∠ ACE=∠ EBD (∠'s in alt segment are =) [not to sure if that is the exact wording oh well]

rectangles?

 

[physician]

The rectangles stand for 'angle'... correct me if i'm wrong Xayma

 

[Xayma]

Well it just means that mojako doesn't have the abilty to display the relevant symbols.

Also I think he would not be able to display ∴ which is therefor. I don't know why, but only some computers can display all of them. My comp around at my mums doesn't but this one does.

Anyway it is the angle sign with the flat bottom.

Edit: This is what it should appear as.

 

[mojako]

my firefox can display this but IE can't

http://www.howtocreate.co.uk/sidehtmlentity.html

Did you use IE Xayma?

 

[Xayma]

my firefox can display this but IE can't

http://www.howtocreate.co.uk/sidehtmlentity.html

Did you use IE Xayma?

Yeah both IE and firefox display them for me. It might be the version of IE, try upgrading it, or just use firefox.

 

[withoutaface]

Firefox>all